Trauma Practice Questions

Q: A 50-year-old female with a 50 kg body weight suffered burns after a pressure cooker blast, involving 45% of her total body surface area. How much fluid should be given in the first 8 hours?

4.5 litres. ***4.5 litres*** - The **Parkland formula** for fluid resuscitation in burn patients is **4 mL x body weight (kg) x % TBSA burned**. - For this patient: 4 mL x 50 kg x 45% = 9000 mL. Half of this volume (4500 mL or **4.5 litres**) is given in the first **8 hours**. *4 litres* - This volume would be insufficient for a patient with a 45% TBSA burn and 50 kg body weight according to the **Parkland formula**. - Undersupplying fluid in severe burns can lead to **hypovolemic shock** and organ dysfunction. *5 litres* - This volume is slightly more than the calculated amount for the first 8 hours based on the **Parkland formula**. - Over-resuscitation can lead to complications such as **pulmonary edema** and **abdominal compartment syndrome**. *6 litres* - This volume is significantly higher than the recommended amount for the first 8 hours, indicating **over-resuscitation**. - Excessive fluid administration can worsen burn edema, leading to **compartment syndromes** and potentially impacting organ function negatively.

Q: What is the primary aim of performing an abbreviated laparotomy in trauma surgery?

Haemostasis. ***Haemostasis*** - The primary aim of abbreviated laparotomy (damage control surgery) is to achieve **rapid control of life-threatening hemorrhage**. - This involves temporary measures to stop bleeding from major vessels and solid organ injuries, preventing exsanguination and further physiological deterioration. - **Damage control prioritizes hemorrhage control over definitive repair**, using techniques like packing, shunts, and temporary vessel ligation. *Definitive repair of all injuries* - This is specifically **NOT** the goal of abbreviated laparotomy. - Definitive repairs are **delayed** until the patient is physiologically stable (after resuscitation in ICU). - Attempting complete repair in an unstable patient leads to the "lethal triad" (hypothermia, acidosis, coagulopathy). *Reduction of contamination* - While contamination control is an **important component** of damage control surgery, it is typically **secondary to hemorrhage control**. - The sequence prioritizes stopping bleeding first, then controlling contamination from bowel injuries. *Rapid stabilization of the patient* - This is the **overall goal** of damage control surgery but not the specific primary aim of the laparotomy itself. - Stabilization is achieved **through** specific interventions during the abbreviated laparotomy, primarily haemostasis and contamination control.

Q: What is the volume threshold that defines a massive blood transfusion?

More than 10 units in 24 hours.. ***More than 10 units in 24 hours.*** - This is the **most widely accepted and standard definition** for a massive blood transfusion used in clinical practice and medical literature. - This threshold indicates that a patient has received a volume of blood products roughly equivalent to their **total blood volume** within a 24-hour period. - This definition is used to trigger **massive transfusion protocols (MTP)** in trauma and critical care settings. *Transfusion of 1 unit every 30 minutes for 6 hours.* - This scenario would result in 12 units over 6 hours, which does represent a massive transfusion situation clinically. However, the **standard textbook definition** refers to the total unit threshold over a 24-hour period, not a rate-based criterion. - While this rate of transfusion is critical and would trigger massive transfusion protocols, the question asks for the **volume threshold definition**, which is standardly stated as ≥10 units in 24 hours. *Transfusion of 5 units in 12 hours.* - This volume of transfusion is considered a **moderate to large transfusion**, not meeting the criteria for a massive blood transfusion. - While substantial and requiring close monitoring, it does not reach the commonly accepted threshold of 10 or more units within 24 hours. *Transfusion of 8 units in 24 hours.* - This amount is significant but falls short of the conventional definition of a **massive blood transfusion**, which requires 10 or more units in 24 hours. - While requiring aggressive management and monitoring, it doesn't meet the standard diagnostic threshold for massive transfusion.

Q: A 35-year-old patient presents to the emergency department following a motor vehicle accident. On examination, the patient has a heart rate of 110 bpm, blood pressure of 90/60 mmHg, and shows signs of anxiety. Estimated blood loss is approximately 1200-1800 mL. According to the hemorrhagic shock classification, this patient would be classified as:

Class 3. ***Class 3*** - **Class 3 hemorrhagic shock** is characterized by an estimated **blood loss of 30-40%** (1500-2000 mL in an adult), typically presenting with a heart rate >120 bpm, systolic blood pressure 120), blood pressure of 90/60 mmHg (less than 100 mmHg systolic), signs of anxiety, and an estimated blood loss of 1200-1800 mL falls squarely within the criteria for Class 3. *Class 1* - **Class 1 hemorrhagic shock** involves a **blood loss of up to 15%** (up to 750 mL), with minimal changes in vital signs; the heart rate is usually 100 bpm but generally 40%** (>2000 mL), characterized by a heart rate >140 bpm, marked hypotension (often unrecordable), and a significantly depressed mental status (lethargic, comatose). - Although the patient's condition is serious, their vital signs and estimated blood loss (1200-1800 mL) do not meet the extreme severity seen in Class 4 shock.

Q: A 24-year-old man falls on the ground when he is struck in the right temple by a baseball. While being driven to the hospital, he lapses into coma. On examination, he is unresponsive with a dilated right pupil. Which of the following is the most important step in initial management?

CT scan of the head. ***CT scan of the head*** - A **CT scan of the head** is crucial for rapidly diagnosing the likely **epidural hematoma** suggested by the mechanism of injury (trauma to the temple, causing rupture of the **middle meningeal artery**) and rapid neurological deterioration with **fixed dilated pupil**. - This imaging will confirm the presence and size of the hematoma, guiding urgent surgical intervention if necessary. - Even in rapidly deteriorating patients, obtaining a CT scan (which takes only minutes) is essential to confirm diagnosis, localize the hematoma, and prevent operating on the wrong side. *Craniotomy* - While a **craniotomy** is the definitive treatment for an epidural hematoma, it should only be performed after a confirmed diagnosis via imaging. - Doing so without imaging risks unnecessary surgery or operating on the wrong side. *X-ray of the skull and cervical spine* - An **X-ray of the skull and cervical spine** would show bone fractures but would not directly visualize an intracranial hematoma, which is the immediate life-threatening issue. - While important for evaluating spinal stability in trauma, it is secondary to assessing intracranial pathology in this rapidly deteriorating patient. *Doppler ultrasound examination of the neck* - A **Doppler ultrasound of the neck** is used to assess vascular structures like the carotid and vertebral arteries. - This would not provide information on intracranial pressure or hematoma formation, which is the immediate concern given the patient's symptoms.

Q: Thoracotomy is indicated in all the following conditions except:

Pulmonary contusion. ***Pulmonary contusion*** - **Pulmonary contusion** is a bruise of the lung parenchyma that typically resolves with **supportive care** (oxygen, fluid management, analgesia, respiratory support) [1]. - It is generally *not* an indication for thoracotomy and is managed **conservatively** in most cases [1]. - Surgical intervention is only considered if complicated by other issues such as **uncontrolled hemorrhage**, massive hemothorax, or other injuries requiring exploration. *Penetrating chest injuries* - While approximately **85% of penetrating chest injuries** are managed conservatively with tube thoracostomy alone, **selective indications** for thoracotomy include: - **Cardiac tamponade** or suspected cardiac injury - **Great vessel injury** with hemodynamic instability - **Massive initial hemothorax** (>1500 mL) or persistent bleeding (>200 mL/hr) - **Trans-mediastinal trajectory** with suspected esophageal or major vascular injury - The key is that *specific criteria* determine need for thoracotomy, not the penetrating injury itself. *Rapidly accumulating haemothorax* - A **rapidly accumulating haemothorax** with **>1500 mL initial output** or **>200 mL/hour for 2-4 consecutive hours** indicates significant ongoing intrathoracic bleeding. - This is an **absolute indication** for thoracotomy for **source identification and hemorrhage control** [2]. - Without surgical intervention, such bleeding leads to **hemodynamic instability**, shock, and death. *Massive air leak* - A **massive persistent air leak** from chest tube, unresponsive to initial management, suggests a large **tracheobronchial injury** or major lung parenchymal disruption [3]. - This persistent leak prevents **lung re-expansion** and adequate ventilation. - Thoracotomy is indicated for **surgical repair** of the damaged bronchus, major airway, or extensive lung laceration [2].

Question 1

A 50-year-old female with a 50 kg body weight suffered burns after a pressure cooker blast, involving 45% of her total body surface area. How much fluid should be given in the first 8 hours?

Accepted Answer

4.5 litres

Answer

4 litres

Answer

5 litres

Answer

6 litres

Question 2

What is the primary aim of performing an abbreviated laparotomy in trauma surgery?

Accepted Answer

Haemostasis

Answer

Definitive repair of all injuries

Answer

Reduction of contamination

Answer

Rapid stabilization of the patient

Question 3

What is the volume threshold that defines a massive blood transfusion?

Accepted Answer

More than 10 units in 24 hours.

Answer

Transfusion of 1 unit every 30 minutes for 6 hours.

Answer

Transfusion of 5 units in 12 hours.

Answer

Transfusion of 8 units in 24 hours.

Question 4

A 35-year-old patient presents to the emergency department following a motor vehicle accident. On examination, the patient has a heart rate of 110 bpm, blood pressure of 90/60 mmHg, and shows signs of anxiety. Estimated blood loss is approximately 1200-1800 mL. According to the hemorrhagic shock classification, this patient would be classified as:

Accepted Answer

Class 3

Answer

Class 1

Answer

Class 2

Answer

Class 4

Question 5

A 24-year-old man falls on the ground when he is struck in the right temple by a baseball. While being driven to the hospital, he lapses into coma. On examination, he is unresponsive with a dilated right pupil. Which of the following is the most important step in initial management?

Accepted Answer

CT scan of the head

Answer

Craniotomy

Answer

Doppler ultrasound examination of the neck

Answer

X-ray of the skull and cervical spine

Question 6

Thoracotomy is indicated in all the following conditions except:

Accepted Answer

Pulmonary contusion

Answer

Rapidly accumulating haemothorax

Answer

Massive air leak

Answer

Penetrating chest injuries

Trauma — MCQs

Trauma — MCQs

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